The effectiveness of protein additives based on the wastes of poultry slaughter in diets for broilers

Abstract

The effectiveness of protein additives based on the wastes of poultry slaughter in diets for broilers (cross Smena-9, 35 birds per treatment, 1-38 days of age) was studied as compared to the traditional diets with fishmeal as an animal protein source. Control treatment 1 was fed diets with fishmeal (FM); in diets for treatments 2 and 3 FM was substituted by fermented feed additive (FFA) and hydrolyzed feed additive (HFA), respectively, produced by the processing of slaughter wastes (feathers, intestines, and blood). The resulting levels of crude protein were similar in all treatments. It was found that the highest growth efficiency was in treatment 2: live bodyweight at 38 days of age was higher by 6.5% in compare to control (p<0.01), average daily weight gain higher by 3.6 g/bird/day; higher digestibility of protein from FFA resulted in feed conversion ratio lower by 1.9% in compare to control. Dressing percentage in this treatment was higher by 0.8% in compare to control, percentage of high-grade carcasses higher by 5.7%; as a result the European production efficiency index (377 points) was higher by 29 points in compare to control.